NORTH AMERICAN HYMENOPTERA. 155 



times connected, thus forming a band, broad band on dorsal segments 3-5, the 

 sixth on each side of pygidium. and a band on ventrals 2 5, that on the second 

 and fifth irregular, bright yellow ; legs excepting the coloration noted, reddish, 

 including the trochanters ; front and medial part of clypeus with golden pubes- 

 cence ; basal two-thirds of wings yellow, fuscous on remainder. Length 13-14 mm. 

 % .—First joint of flagellum not nearly as long as the two following joints 

 united, the four basiil joints united about as long as the six terminal ones com- 

 bined ; dorsulura coarsely punctured; middle segment more coarsely striated 

 than in the ? , particularly the sides ; fore femora not at all produced at base 

 beneath; first and second joints of middle tarsi slightly curved, produced at 

 apex, the first somewhat longer than the following two combined ; abdomen dis- 

 tinctly punctured, the first dorsal segment strongly so, the second ventral finely 

 and closely ; colored like the 9 , except that no spot is present on epimerum 

 mesopleuralis and first abdominal segment, and the band on second segment is 

 sometimes narrower and irregular. Length 11-12 mm. 



Lower California; Arizona; Colorado. Easily distinguished by 

 the position of ocelli, sculpture and coloration. 



27. Crabro clirysarginus St. F. and Br. 



Crabro chnjsnrginus Lepeletier de St. Fargeau et Brulle, Ann Soc. Ent. Fr., 

 iii, p. 711, 9. 



Crabro arciiatus Say, Bost. Journ. Nat. Hist., i, p. 377. 



Crabro chrymrgurufi Dahlbohm, Hym. Eur., i, p. 386. 



Crabro Packardii Cresson (in pt.), 1. c, p. 477. 



Crabro honestus Cresson, ibid. p. 485, % . 



Crabro chrysarginus Packard, 1. c, p. 82, % 9 • 



Crabro viUodfrons Packard, ibid. p. 83, 9 • 



c . Head very finely and closely punctured ; frontal impressed line faint ; 



space between hind ocelli somewhat less than that between them and the nearest 

 eye-margin ; first joint of flagellum fully as long as the two following joints 

 united ; space between the eyes at the base of clypeus not greater than the width 

 of the latter in the middle; lateral tooth of pronotum rather small; dorsulum 

 compactly punctured, a little more coarsely so than the head, the scutellum some- 

 what more sparsely; mesopleurse, tolerably coarsely striato-punctate, the punctures 

 more distinct in some specimens than in others, the episternal suture rather 

 strongly foveolate; middle segment finely striated, delicately so on the sides; ab- 

 domen dorsally very finely and closely punctured, including the first dorsal seg- 

 ment, the second ventral with larger, scattered punctures. Black ; mandibles 

 except apex and outer margin, scape, two spots on pronotum, tubercles, episternum 

 mesopleuralis more or less, scutellum in part or not at all, a spot at each side of 

 it anteriorly, metauotum, femora apically to a greater or less extent, tibise entirely 

 or with a dark spot within, tarsi except apical joints, a spot at each side of the 

 first dorsal segment broadest internally, spot at each side of segments 2 aud 3, 

 that on the latter segment narrowest, aud a band on segments 4 and 5, that on 

 the fourth sometimes broken medially, yellow ; silvery pubescence of clypeus 

 sometimes pertaining to golden on medial portion ; wings dark subhyaline, ner- 

 vures and stigma testaceous. Length 11-14 mm. 



% .—Head more distinctly punctured than in the 9 5 ocelli forming a low 

 triangle, the space between the hind pair less than that between them and the 



TKANS. AM. ENT. SOC. XXII. JUNE, 1895. 



